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Astronaut Karol J. Bobko, Skylab Medical Experiment Altitude Test (SMEAT) pilot, is configured for a test in the Lower Body Negative Pressure experiment. Dr. William E. Thornton, SMEAT science pilot, stands by at the controls. Bobko and Thornton are two members of a three-man SMEAT crew who will spend up to 56 days in the Crew Systems Division's 20-foot altitude chamber at the Manned Spacecraft Center (MSC) beginning in mid-July to give a preview of the use of the SMEAT. Astronaut Robert L. Crippen, SMEAT commander, the third crew member is not shown in this view.